//端口映射  调用方式 node proxyPort 6500 127.0.0.1 6100

var net = require('net');

function proxyPort(srcport,destServer,destport)
{
    var server = net.createServer(function(c) { //'connection' listener

        c.on('end', function() {
            console.log('src disconnected');
        });

        var client = net.connect({port: destport,host:destServer},function() { //'connect' listener
            console.log('ok....');
            c.on('data', function(data) {
                console.log(data.length);
                client.write(data);
            });
        });

        client.on('error', function(err) {
            console.log("dest=" + err);
            c.destroy();
        });

        c.on('error', function(err) {
            console.log("src" + err);
            client.destroy();
        });

        client.on('data', function(data) {
            c.write(data);
        });

        client.on('end', function() {
            console.log('dest disconnected ');
        });

    });
    server.listen(srcport, function() { //'listening' listener
        console.log('server bound' + srcport);
    });
}

// var params = process.argv;
// if(params.length != 5){
//     console.log("node port.js srcport destserver destport ");
//     return;
// }

proxyPort(6777,'localhost',27017);

// console.log(process.argv);